The line charts illustrate the percentage of households with electrical appliances and the number of hours of household per week, per household in one country from 1920 to 2019.
      
Overall
, both vacuum cleaners and Linking Words
refrigerators
 increased throughout Use synonyms
this
 period which became the most used appliances in 2019. On one hand, the time of housework decreased from 1920 to 2019.
       Linking Words
It is clear that
 in 1920, washing machines with 40% were the most consuming electrical product in many houses, Linking Words
while
 Linking Words
refrigerators
 were near zero in working by ownership. Between 1920 and 1980, all graph lines dramatically changed. It can be seen that the rate of using Use synonyms
refrigerators
 reached 100%, and the percentage of using vacuum cleaners jumped from 30% to 90%. But washing machines decreased slightly to around 65% except growing between 1920 and 1960. Use synonyms
Finally
, Linking Words
refrigerators
 kept their trend steady from 1980 to 2019. Vacuum cleaners peaked Use synonyms
to
 100% in 2000 and stayed constant Change preposition
at
to
 the next year and washing Change preposition
for
machine
 Fix the agreement mistake
machines
raised
 moderately Verb problem
rose
which 
placed Correct pronoun usage
apply
in
 around 75%.
        Change preposition
at
According to
 another table which describes the time of housework, it shows a drop from 50 hours per week to just near 10 hours per week from 1920 to 2019.Linking Words